Pub Date : 2021-01-01DOI: 10.1504/ijhm.2022.10044145
B. Šarler, S. Bajt, R. Zahoor
{"title":"A numerical investigation of micro-jet characteristics in different pressure environments","authors":"B. Šarler, S. Bajt, R. Zahoor","doi":"10.1504/ijhm.2022.10044145","DOIUrl":"https://doi.org/10.1504/ijhm.2022.10044145","url":null,"abstract":"","PeriodicalId":29937,"journal":{"name":"International Journal of Hydromechatronics","volume":"1 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66893118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1504/ijhm.2021.120617
X. Xie, Chunyu Zhu, Ming Xie
{"title":"Visual tracking control of SCARA robot system based on deep learning and Kalman prediction method","authors":"X. Xie, Chunyu Zhu, Ming Xie","doi":"10.1504/ijhm.2021.120617","DOIUrl":"https://doi.org/10.1504/ijhm.2021.120617","url":null,"abstract":"","PeriodicalId":29937,"journal":{"name":"International Journal of Hydromechatronics","volume":"1 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66893351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1504/ijhm.2022.10043942
A. Balakrishna, P. K. Mishra
{"title":"Modelling and analysis of static and modal responses of leaf spring used in automobiles","authors":"A. Balakrishna, P. K. Mishra","doi":"10.1504/ijhm.2022.10043942","DOIUrl":"https://doi.org/10.1504/ijhm.2022.10043942","url":null,"abstract":"","PeriodicalId":29937,"journal":{"name":"International Journal of Hydromechatronics","volume":"1 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66893434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1504/IJHM.2021.10035377
T. Hahn, C. Mechefske
: The use of end-to-end deep learning in machinery health monitoring allows machine learning models to be created without the need for feature engineering. The research presented here expands on this use in the context of tool wear monitoring. A disentangled-variational-autoencoder, with a temporal convolutional neural network, is used to model and trend tool wear in a self-supervised manner, and anomaly detection is used to make predictions from both the input and latent spaces. The method achieves a precision-recall area-under-curve (PR-AUC) score of 0.45 across all cutting parameters on a milling dataset, and a top score of 0.80 for shallow depth cuts. The method achieves a top PR-AUC score of 0.41 on a real-world industrial CNC dataset, but the method does not generalise as well across the broad range of manufactured parts. The benefits of the approach, along with the drawbacks, are discussed in detail.
{"title":"Self-supervised learning for tool wear monitoring with a disentangled-variational-autoencoder","authors":"T. Hahn, C. Mechefske","doi":"10.1504/IJHM.2021.10035377","DOIUrl":"https://doi.org/10.1504/IJHM.2021.10035377","url":null,"abstract":": The use of end-to-end deep learning in machinery health monitoring allows machine learning models to be created without the need for feature engineering. The research presented here expands on this use in the context of tool wear monitoring. A disentangled-variational-autoencoder, with a temporal convolutional neural network, is used to model and trend tool wear in a self-supervised manner, and anomaly detection is used to make predictions from both the input and latent spaces. The method achieves a precision-recall area-under-curve (PR-AUC) score of 0.45 across all cutting parameters on a milling dataset, and a top score of 0.80 for shallow depth cuts. The method achieves a top PR-AUC score of 0.41 on a real-world industrial CNC dataset, but the method does not generalise as well across the broad range of manufactured parts. The benefits of the approach, along with the drawbacks, are discussed in detail.","PeriodicalId":29937,"journal":{"name":"International Journal of Hydromechatronics","volume":"1 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66892924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1504/IJHM.2021.10035915
Tomonori Kato, Y. Xu, Tomohiro Tanaka, K. Shimazaki
{"title":"Force control for ultraprecision hybrid electric-pneumatic vertical-positioning device","authors":"Tomonori Kato, Y. Xu, Tomohiro Tanaka, K. Shimazaki","doi":"10.1504/IJHM.2021.10035915","DOIUrl":"https://doi.org/10.1504/IJHM.2021.10035915","url":null,"abstract":"","PeriodicalId":29937,"journal":{"name":"International Journal of Hydromechatronics","volume":"1 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66892948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-21DOI: 10.1504/ijhm.2020.10034070
Y. Sun, Dianrong Gao, Zongyi Zhang, J. Zhao, Bo Chen
A snowmaking nozzle based on the principle of supersonic speed of Laval nozzle is proposed, and the influence of its operation and structural parameters on flow field and temperature field characteristics is analysed. The results show that the gas-liquid mixture velocity outside the nozzle outlet increases with the increase of air inlet pressure, water inlet pressure and throat diameter, decreases with the increase of distance between water inlet and nozzle outlet. The gas-liquid mixture temperature outside the nozzle outlet increases as water inlet pressure and distance between water inlet and nozzle outlet increases, decreases as air inlet pressure and throat diameter increases. As gas-liquid pressure ratio increases, the gas-liquid mixture velocity outside the nozzle outlet tends to decrease first, then increase and then decrease, while its temperature tends to increase first, then decrease and then increase. When gas-liquid pressure ratio α = 3, this nozzle has the best performance.
{"title":"Study on flow field and temperature field characteristics of gas-liquid two-fluid snowmaking nozzle","authors":"Y. Sun, Dianrong Gao, Zongyi Zhang, J. Zhao, Bo Chen","doi":"10.1504/ijhm.2020.10034070","DOIUrl":"https://doi.org/10.1504/ijhm.2020.10034070","url":null,"abstract":"A snowmaking nozzle based on the principle of supersonic speed of Laval nozzle is proposed, and the influence of its operation and structural parameters on flow field and temperature field characteristics is analysed. The results show that the gas-liquid mixture velocity outside the nozzle outlet increases with the increase of air inlet pressure, water inlet pressure and throat diameter, decreases with the increase of distance between water inlet and nozzle outlet. The gas-liquid mixture temperature outside the nozzle outlet increases as water inlet pressure and distance between water inlet and nozzle outlet increases, decreases as air inlet pressure and throat diameter increases. As gas-liquid pressure ratio increases, the gas-liquid mixture velocity outside the nozzle outlet tends to decrease first, then increase and then decrease, while its temperature tends to increase first, then decrease and then increase. When gas-liquid pressure ratio α = 3, this nozzle has the best performance.","PeriodicalId":29937,"journal":{"name":"International Journal of Hydromechatronics","volume":" ","pages":""},"PeriodicalIF":5.1,"publicationDate":"2020-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43009595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-25DOI: 10.1504/ijhm.2020.10030654
S. K. Panda, P. Mishra, Biswaranjan Patra, S. Panda
The demand for high speed, enhanced performance and greater reliable of machineries is increased, prediction and control of gear defects like vibration, noise and diagnosis of same are the primary consideration. In this paper, the static and dynamic behaviour of the spur gear are modelled and analysed using SOLIDWORKS and three dimensional finite element method (ANSYS workbench), respectively. Different stress components for spur gear are evaluated with varying pressures angles, keyway types, i.e., single or double made with both square or rectangular shape and material properties. Minimum stresses are observed in the gear made of 20° pressure angle with double square keyway. It is also found that stress components in the gear decrease with an increase in pressure angle. Similarly, it can be concluded that a single rectangle keyway with 14.5° pressure angle spur gear shows more resistance to free vibration and grey cast iron is the suitable material.
{"title":"Static and dynamic analysis of spur gear","authors":"S. K. Panda, P. Mishra, Biswaranjan Patra, S. Panda","doi":"10.1504/ijhm.2020.10030654","DOIUrl":"https://doi.org/10.1504/ijhm.2020.10030654","url":null,"abstract":"The demand for high speed, enhanced performance and greater reliable of machineries is increased, prediction and control of gear defects like vibration, noise and diagnosis of same are the primary consideration. In this paper, the static and dynamic behaviour of the spur gear are modelled and analysed using SOLIDWORKS and three dimensional finite element method (ANSYS workbench), respectively. Different stress components for spur gear are evaluated with varying pressures angles, keyway types, i.e., single or double made with both square or rectangular shape and material properties. Minimum stresses are observed in the gear made of 20° pressure angle with double square keyway. It is also found that stress components in the gear decrease with an increase in pressure angle. Similarly, it can be concluded that a single rectangle keyway with 14.5° pressure angle spur gear shows more resistance to free vibration and grey cast iron is the suitable material.","PeriodicalId":29937,"journal":{"name":"International Journal of Hydromechatronics","volume":" ","pages":""},"PeriodicalIF":5.1,"publicationDate":"2020-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42473646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-15DOI: 10.1504/ijhm.2020.10029838
Basher Hassan Al-Kbodi, Taha Rajeh, Houlei Zhang
We present a second law-based investigation on the heat transfer performance of paddle-shaft components. Entropy generation rate distribution is obtained through numerical simulation. We show that the design with hollow paddles (HP) transfers more heat and causes larger entropy generation than that with solid paddles (SP). For HP, the solid domain produces much less entropy generation rate than the fluid domain and the material-solid interface. In the fluid domain, for SP, the pressure drop-induced irreversibility is negligible; for HP, it is important when the flow rate is large. For HP, near the flow holes, the local entropy generation rate is the largest, and near the fluid-paddle interface, it is less. In the centre regions of the fluid domain and the paddles, the local entropy generation rate is the least and approaches zero for both HP and SP. The work helps identify the dominant irreversibility and select proper designs in practice.
{"title":"Irreversibility distribution in heat transfer process of hollow paddle-shaft components","authors":"Basher Hassan Al-Kbodi, Taha Rajeh, Houlei Zhang","doi":"10.1504/ijhm.2020.10029838","DOIUrl":"https://doi.org/10.1504/ijhm.2020.10029838","url":null,"abstract":"We present a second law-based investigation on the heat transfer performance of paddle-shaft components. Entropy generation rate distribution is obtained through numerical simulation. We show that the design with hollow paddles (HP) transfers more heat and causes larger entropy generation than that with solid paddles (SP). For HP, the solid domain produces much less entropy generation rate than the fluid domain and the material-solid interface. In the fluid domain, for SP, the pressure drop-induced irreversibility is negligible; for HP, it is important when the flow rate is large. For HP, near the flow holes, the local entropy generation rate is the largest, and near the fluid-paddle interface, it is less. In the centre regions of the fluid domain and the paddles, the local entropy generation rate is the least and approaches zero for both HP and SP. The work helps identify the dominant irreversibility and select proper designs in practice.","PeriodicalId":29937,"journal":{"name":"International Journal of Hydromechatronics","volume":" ","pages":""},"PeriodicalIF":5.1,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49508628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-15DOI: 10.1504/ijhm.2020.10029837
N. Caetano, E. Barreto, A. C. Ruoso, M. A. Klunk, P. Wander
This work presents an exergetic analysis applied in a configuration in which two regenerators were in parallel for a combined gas-steam power cycle. The working fluids considered for the gas and vapour cycles were air and water. In this case, two heat recovery steam generators vaporise water and reheat using a steam turbine second stage, where the full power cycle was 10,000 kW. A numerical study was performed from 100 to 7,000 kPa steam pressure. The exergy approach was performed in order to maximise the thermal efficiency. The benefits brought by two regenerators was an increase of 37% in the thermal efficiency. Also, the second regenerator reduces the lost exergy in the exhaust gases. Reductions of 81% were observed in the condenser.
{"title":"Exergetic analysis in a combined gas-steam power cycle with two regenerators in parallel","authors":"N. Caetano, E. Barreto, A. C. Ruoso, M. A. Klunk, P. Wander","doi":"10.1504/ijhm.2020.10029837","DOIUrl":"https://doi.org/10.1504/ijhm.2020.10029837","url":null,"abstract":"This work presents an exergetic analysis applied in a configuration in which two regenerators were in parallel for a combined gas-steam power cycle. The working fluids considered for the gas and vapour cycles were air and water. In this case, two heat recovery steam generators vaporise water and reheat using a steam turbine second stage, where the full power cycle was 10,000 kW. A numerical study was performed from 100 to 7,000 kPa steam pressure. The exergy approach was performed in order to maximise the thermal efficiency. The benefits brought by two regenerators was an increase of 37% in the thermal efficiency. Also, the second regenerator reduces the lost exergy in the exhaust gases. Reductions of 81% were observed in the condenser.","PeriodicalId":29937,"journal":{"name":"International Journal of Hydromechatronics","volume":" ","pages":""},"PeriodicalIF":5.1,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45399264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-15DOI: 10.1504/ijhm.2020.10029912
V. Pinto, M. Cunha, K. Martins, L. Rocha, M. V. Real, E. D. Santos, L. Isoldi
The present work applied the constructal design method associated with computational modelling by the finite element method to evaluate the mechanical deflection behaviour of stiffened rectangular steel plates submitted to uniform transverse loading. To do so, a rectangular reference plate without stiffeners was considered. A steel volume portion of this plate was converted into stiffeners through the ϕ parameter, which represents the ratio between the stiffeners volume and the total volume of the reference plate. By adopting ϕ = 0.3, ten stiffened plates were configured: five with rectangular stiffeners and five with trapezoidal stiffeners. By keeping constant the total steel volume, the influence of geometry and number of stiffeners were studied regarding the maximum plate deflection. The results indicated that the trapezoidal shape for the stiffeners could minimise the maximum deflection until around 30% if compared with the rectangular shape stiffeners.
{"title":"Geometric evaluation of steel plates subjected to uniform transverse load with rectangular or trapezoidal stiffeners by means constructal design method","authors":"V. Pinto, M. Cunha, K. Martins, L. Rocha, M. V. Real, E. D. Santos, L. Isoldi","doi":"10.1504/ijhm.2020.10029912","DOIUrl":"https://doi.org/10.1504/ijhm.2020.10029912","url":null,"abstract":"The present work applied the constructal design method associated with computational modelling by the finite element method to evaluate the mechanical deflection behaviour of stiffened rectangular steel plates submitted to uniform transverse loading. To do so, a rectangular reference plate without stiffeners was considered. A steel volume portion of this plate was converted into stiffeners through the ϕ parameter, which represents the ratio between the stiffeners volume and the total volume of the reference plate. By adopting ϕ = 0.3, ten stiffened plates were configured: five with rectangular stiffeners and five with trapezoidal stiffeners. By keeping constant the total steel volume, the influence of geometry and number of stiffeners were studied regarding the maximum plate deflection. The results indicated that the trapezoidal shape for the stiffeners could minimise the maximum deflection until around 30% if compared with the rectangular shape stiffeners.","PeriodicalId":29937,"journal":{"name":"International Journal of Hydromechatronics","volume":" ","pages":""},"PeriodicalIF":5.1,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46206092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：